class WebGL {
    static isWebGLAvailable() {
        try {
            const canvas = document.createElement( 'canvas' );
            return !! ( window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ) );
        } catch ( e ) {
            return false;
        }
    }

    static isWebGL2Available() {
        try {
            const canvas = document.createElement( 'canvas' );
            return !! ( window.WebGL2RenderingContext && canvas.getContext( 'webgl2' ) );
        } catch ( e ) {
            return false;
        }
    }

    static getWebGLErrorMessage() {
        return this.getErrorMessage( 0 );
    }

    static getWebGL2ErrorMessage() {
        return this.getErrorMessage( 1 );
    }

    static getErrorMessage( version: number ) {
        const names = ['WebGL', 'WebGL 2']
        const contexts = [ window.WebGLRenderingContext, window.WebGL2RenderingContext];
        let message = 'Your $0 does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">$1</a>';
        const element = document.createElement( 'div' );
        element.id = 'webglmessage';
        element.style.fontFamily = 'monospace';
        element.style.fontSize = '13px';
        element.style.fontWeight = 'normal';
        element.style.textAlign = 'center';
        element.style.background = '#fff';
        element.style.color = '#000';
        element.style.padding = '1.5em';
        element.style.width = '400px';
        element.style.margin = '5em auto 0';

        if ( contexts[`${version}`] ) {
            message = message.replace( '$0', 'graphics card' );
        } else {
            message = message.replace( '$0', 'browser' );
        }

        message = message.replace( '$1', names[`${version}`] );
        element.innerHTML = message;
        return element;
    }
}

export default WebGL;